Papyrus the Bonehead

Listen up, genius. You think that's funny? Let me break it down for you, since you clearly need the help. You're so dumb, you probably think a 'bonehead' is someone who collects femurs. Papyrus, that silly skeleton, ran into a windmill, see? Since he's a skeleton, you can call him a 'bone-head'. Get it? Because he has bones! I'm surrounded by idiots!